Frame Corner
Dimension
The dimensions of four types of frame corners (Upper Left, Upper Right, Lower Left, Lower Right) subjected to opening or closing moments are assigned. The boundary lines of a frame corner are drawn according to the assigned dimensions. The loads and the areas of reinforcing bars must be converted to those of the frame corner with 1 meter thickness since the thickness of the frame corner is assumed to be 1 meter.
Load
The opening moments or closing moments are assigned. After assigning the load name, it can be altered, added, or deleted in the DEFINE-Static Load. The positive moment that acts to the directions shown in the figure must be assigned.
STM setting
Different information according to the types of frame corners and moments is assigned for the automatic construction of the strut-tie model for frame corner. The assigned moments are converted to the distributed or concentrated forces at their corresponding sections for plane solid analysis. In the strut-tie model analysis, the moments are converted to the concentrated forces. Four types of strut-tie models under closing and opening moments on two upper left frame corners are shown below
Four reference distances and a truss angle are assigned for the automatic construction of the strut-tie model for the frame corner subjected to two closing moments.
Opening Moment Type1
Four reference distances are assigned for the automatic construction of the strut-tie model for the frame corner subjected to two opening moments.
Four reference distances and one distance ratio are assigned for the automatic construction of the strut-tie model for the frame corner subjected to two opening moments.
Rebar
The areas of reinforcing bars assigned to the frame corners are recognized as the steel tie areas of the strut-tie models for the frame corners. The information on the reinforcing bars can be altered, added, or deleted in the DEFINE-Tie Types-Reinforcement Ties. The information can be assigned to the elements of the strut-tie model in the ASSIGN-Tie Types.
Closing Moment Type 2
Opening Moment Type 1
Opening Moment Type 2
